INVERTABRATES

• Mollusks
• Sponges
• Arthropods
• Worms
• Echinoderms

MOLLUSKS

• Have soft bodies
• Have a thick muscular foot
• They take in oxygen through gills or lungs
• Some have shells

SPONGES

• Very simple animals
• They get food and eliminate waste through this flow of water
• Specialized cells for obtaining food and oxygen for water
• Have many pores in their body. Water flows through the pores
• Water moves into a central cavity and out through a big opening in the top

ATHROPODS

• They have jointed legs
• They have segmented bodies
• Some have wings
• Have exoskeletons
• Breathe through gills or air tubes

WORMS

• Have long tube- like bodies that are divided into segments
• Simplest orginisms with: a nerves system, blood in vessels
• Long digestive tube that runs through inner bodie
• Take in oxygen from the water through their skin

ECHINODERMS

• Have arms that extend from the middle of their bodie
• Have tube feet that take in oxygen
• Have spines
• Ex: sea stars, brittle stars, and sea cucumbers

THESE ARE ALL CHARACTERISTICS OF INVERTEBRATES